Several years ago I was essentially living at the same Hyatt in Houston for months at a time and got to know several staff members quite well. I was told I was a nine and the number rating had more to do with how many Hyatt nights you had stayed recently, but there was extra credit added at their hotel as a very frequent guest. (I was told I was one of their 10 most-frequent guests that year). I was on a lowball corporate rate so it could not have been dollars spent.